Instance method callback in CoffeeScript

If you need to use an instance method on a callback in CoffeeScript when calling it from an instance method, this is an example of how you can do it:

class Dog
  fetch_later: ->
    @message_for_fetch_later()
  message_for_fetch_later: ->
    alert "Ok, I will fetch that later."
  prepare_fetch_later: ->
    setTimeout((=> @fetch_later();return;),1000)

doggy = new Dog

doggy.prepare_fetch_later()

What this does in javascript is to set a this variable to point to the object, and create a closure and run _this.fetchlater() inside that closure. The additional return is to avoid returning values.